709422840 has 256 divisors, whose sum is σ = 2730931200. Its totient is φ = 160455168.

The previous prime is 709422839. The next prime is 709422871. The reversal of 709422840 is 48224907.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 709422795 and 709422804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 808482 + ... + 809358.

It is an arithmetic number, because the mean of its divisors is an integer number (10667700).

Almost surely, 2^709422840 is an apocalyptic number.

709422840 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 709422840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1365465600).

709422840 is an abundant number, since it is smaller than the sum of its proper divisors (2021508360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

709422840 is a wasteful number, since it uses less digits than its factorization.

709422840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1011 (or 1001 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 709422840 is about 26634.9927726666. The cubic root of 709422840 is about 891.8703418425.

The spelling of 709422840 in words is "seven hundred nine million, four hundred twenty-two thousand, eight hundred forty".